Electric fireplace



FIG. 1 is a perspective view of an electric fireplace showing my present design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines depict portions of the electric fireplace, that form no part of the claimed design. 

CLAIM The ornamental design for an electric fireplace, as shown and described. 